Lab-A(config-if)

Configuring Routers

Oh No! I’ve got to program a router!


What do I have to do


Router>

Router>enable

Router#

Router#config t

Config t is the place to be!

Log on to the router


Name the router!

Router(config)#hostname Lab
-
A

Step One

Lab
-
A

Password protect the Privilege
Mode

Step Two

Lab
-
A(config)#enable secret class



enable secret 5 $1$emBK$WxqLahy7YOAf0nifub.hU


Results in:

Password

Commands

Configure the Interfaces

Step Three

Lab
-
A(config)#interface serial0

Lab
-
A(config
-
if)#

(
Note prompt change)

Address the Interface(S0)

Lab
-
A(config
-
if)#ip address 201.100.11.1 255.255.255.0

Ip address

Subnet mask

S0=201.100.11.1

S0

Clock ticks MUST be set
between routers on the interface
with the serial cable DCE end.

Serial0 is where the
DCE connects in our
lab.

We use Serial0

•
Lab
-
A(config
-
if)#clock rate 56000

Address the next Interface (E0)

Lab
-
A(config
-
if)#ip address 192.5.5.1 255.255.255.0

Lab
-
A(config
-
if)#interface ethernet0

(
This changes to program interface e0)

S0=201.100.11.1

E0=192.5.5.1

E0

S0

Address the next Interface (e1)

Lab
-
A(config
-
if)#ip address 205.7.5.1 255.255.255.0

Lab
-
A(config
-
if)#interface ethernet1

(
This changes to program interface e1)

S0=201.100.11.1

E0=192.5.5.1

E1=205.7.5.1

S1=No address

E1

S0

E0

Control z

Lab
-
A#

Lab
-
A#show running
-
config

Results:

•
version 12.0

•
service timestamps debug uptime

•
service timestamps log uptime

•
no service password
-
encryption

•
service udp
-
small
-
servers

•
service tcp
-
small
-
servers

•
!

•
hostname Lab
-
A

•
!

•
enable secret 5 $1$emBK$WxqLahy7YOAf0nifub.hU.

•
!

•
ip subnet
-
zero


--
More
--

interface Ethernet0


ip address 192.5.5.1 255.255.255.0


no ip directed
-
broadcast

shutdown

!

interface Ethernet1


ip address 205.7.5.1 255.255.255.0


no ip directed
-
broadcast

shutdown


--
More
--


interface Serial0


ip address 201.100.11.1 255.255.255.0


no ip directed
-
broadcast


no ip mroute
-
cache


clockrate 56000

shutdown

!

interface Serial1


no ip address


no ip directed
-
broadcast


shutdown

Like people, routers have to talk
to one another!

Like people, routers have to talk
to one another!

Step Four

Set up routing protocols

Routing Protocols:

RIP





RIPv2

IGRP




EIGRP




OSPF

Set up the routing protocol

Lab
-
A(config)#router rip

Lab
-
A(config
-
router)# version 2


Lab
-
A(config
-
router)#network 192.5.5.0

Lab
-
A(config
-
router)#network 207.7.5.0

Lab
-
A(config
-
router)#network 201.100.11.0


(
Note prompt change)

Note!

•
You have to configure for EACH network

•
(remember network # is the “wire” #)

•
Each network is on a separate line

•
Hit Control z to activate and return to:


•
Lab
-
A#


Lab
-
A#show run

!

router rip

version 2


network 192.5.5.0


network 201.100.11.0


network 205.7.5.0

!


(
router portion of show run)

Control Access

Control and secure access from:

CONSOLE

VTY (telnet)

AUX (modem)

Control Access

Step Five

Lab
-
A(config)#line console 0

Lab
-
A(config
-
line)#password cisco

(
Note prompt change)

Lab
-
A(config
-
line)#login

Continue

Lab
-
A(config)#line vty 0 4

Lab
-
A(config
-
line)#password cisco

Lab
-
A(config
-
line)#login

Control Z

(typing the word “exit” at the prompt takes
you up one level)

Lab
-
A#show run will give the following results:

line con 0


password cisco


login


transport input none

line aux 0

line vty 0 4


password cisco


login


Want to save time and move fast
between routers?

Step Six

A REAL time Saver!

Lab
-
A(config)#
ip host Lab
-
A 192.5.5.1 205.7.5.1 201.100.11.1

Lab
-
A(config)#
ip host Lab
-
B 219.17.100.1 199.6.13.1 201.100.11.2

Lab
-
A(config)#
ip host Lab
-
C 223.8.151.1 204.204.7.1 199.6.13.2

Lab
-
A(config)#
ip host Lab
-
D 210.93.105.1 204.204.7.2

Lab
-
A(config)#
ip host Lab
-
E 210.93.105.2

Lab
-
A(config)#control z

Turn on the interfaces:

•
Lab
-
A(config)#interface s0

•
Lab
-
A(config
-
if)#no shutdown

•
Lab
-
A(config
-
if)#interface e0

•
Lab
-
A(config
-
if)#no shutdown

•
Lab
-
A(config
-
if)#interface e1

•
Lab
-
A(config
-
if)#no shutdown


Step Seven

For Lab
-
A router, you
are through!

Program the other routers the
same way, BUT:

•
Use the interfaces in use on each particular
router

•
Use the correct ip address/network address
for each port on that router

•
Check and save your configuration!

•
Router#show run
(Check)

•
Router#copy run start
(S
ave)

Let’s Review:

•
Step 1
–

name router

•
Hostname xxxxx

•
Step 2
–

set “privilege” password and
encode it

•
Enable secret xxxxx

•
Step 3
–

configure interfaces

•
Interface sX (or eX)



•
Step 4
–

Set the routing protocols

•
Router rip

•
Step 5
–

Set who and where access comes
from

•
Line console (vty)

•
Step 6
–

Save Time

•
Ip host xxx.xxx.xxx yyy.yyy.yyy

•
Step 7
–

Turn on interfaces

•
Router(config
-
if)#no shutdown



Check and Save your work!

•
Check your config

•
Router#show run

•
Save your configuration from RAM to
NVRAM

•
Router#copy run start

You’re Through!